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layout: Implement node geometry queries against BoxTree's Fragment (#36663)

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This is a followup to #36629, continuing to implement script-based
layout queries  using the `Fragment`s attached to the `BoxTree`. In this
change, geometry queris (apart from parent offset) are calculated using
`Fragment`s hanging of the `BoxTree`.

In order to make this work, all `Fragment`s for inlines split by blocks,
need to be accessible in the `BoxTree`. This required some changes to
the way that box tree items were stored in DOM `BoxSlot`s. Now every
inline level item can have more than a single `BoxTree` item. These are
carefully collected by the `InlineFormattingContextBuilder` -- currently
a bit fragile, but with more documentation.

Testing: There are tests for these changes.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Oriol Brufau <obrufau@igalia.com>
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Martin Robinson 2025-04-25 15:38:05 +02:00 • committed by GitHub
parent cc91395397
commit b63a1818c4
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13 changed files with 197 additions and 170 deletions
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6
components/shared/script_layout/lib.rs
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@ -243,9 +243,9 @@ pub trait Layout {
/// Set the scroll states of this layout after a compositor scroll.
fn set_scroll_offsets(&mut self, scroll_states: &[ScrollState]);
fn query_content_box(&self, node: OpaqueNode) -> Option<Rect<Au>>;
fn query_content_boxes(&self, node: OpaqueNode) -> Vec<Rect<Au>>;
fn query_client_rect(&self, node: OpaqueNode) -> Rect<i32>;
fn query_content_box(&self, node: TrustedNodeAddress) -> Option<Rect<Au>>;
fn query_content_boxes(&self, node: TrustedNodeAddress) -> Vec<Rect<Au>>;
fn query_client_rect(&self, node: TrustedNodeAddress) -> Rect<i32>;
fn query_element_inner_outer_text(&self, node: TrustedNodeAddress) -> String;
fn query_nodes_from_point(
&self,